期刊：
POLISH JOURNAL OF VETERINARY SCIENCES,2017年20(1):25-29 ISSN：1505-1773
通讯作者：
Deng, Z. B.
作者机构：
[Pang, P.; Yuan, A. W.; Deng, Z. B.; Gong, Q. L.] Hunan Agr Univ, Coll Vet Med, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Deng, Z. B.] H;Hunan Agr Univ, Coll Vet Med, Changsha 410128, Hunan, Peoples R China.
关键词：
Life Sciences;Zoology;Life Sciences, other;Medicine;Veterinary Medicine
摘要：
Porcine circovirus type 2 (PCV2) has been known as a causative agent of reproductive failure in the sow. In the present study mouse model was used to investigate PCV2 infection. In order to investigate whether PCV2 can induce lesions of spermatocytes and oocytes, 6 male and 6 female mice were each inoculated intraperitoneally with PCV2b, and 3 male and 3 female mice mock-infected with cell culture supernatant served as controls. Samples of testes and ovaries from PCV2b-inoculated and mock-infected mice were investigated using PCR, histopathological, ultrastructural and immunofluorescent histochemical methods at 14 and 21 day post infection (dpi). The study revealed that in the virus-inoculated mice leydig cells in testes and granulosa cells in ovaries were degenerated, and a small number of spermatocytes and oocytes showed apoptosis. Positive PCV2b antigen signals were also observed in these apoptotic cells. It can be suggested that PCV2 can cause lesions of spermatocyte and oocyte prior to zygotes formation in its host.
摘要：
Peroxisome proliferator-activated receptor (PPAR) gamma has been reported to be implicated in placentation in mice. Previous studies have demonstrated that PPARgamma is also expressed in porcine placenta, primarily localized in vascular endothelial cells (VECs). The present study aimed to investigate the roles of PPARgamma during porcine placental angiogenesis and examine the molecular mechanisms involved in its actions. VECs were incubated with the PPARgamma agonist rosiglitazone and the antagonist T0070907, and their angiogenic potential was evaluated using cellular impedance, wound healing and tube formation assays. Reverse transcriptionquantitative polymerase chain reaction was used to assess the mRNA expression levels of angiogenic factors, including hypoxiainducible factors (HIFs), vascular endothelial growth factor (VEGF) isoforms, VEGF receptors (VEGFRs) and angiopoietins (Angs). The results demonstrated that the adhesive, proliferative and migratory capabilities of VECs were potentiated by rosiglitazone and suppressed by T0070907. Notably, tube formation was invariably promoted during PPARgamma activation and blockade. The mRNA expression levels of HIF1alpha, HIF2alpha, VEGFR2, VEGF188 and Ang1 were revealed to be upregulated following treatment of VECs with rosiglitazone, whereas they were downregulated following treatment with T0070907. However, the mRNA expression levels of placental growth factor and VEGF120 were consistently downregulated following PPARgamma activation and blockade, whereas VEGF164 mRNA levels remained unaltered. The results of the present study suggested that PPARgamma may mediate porcine placental angiogenesis, by interfering with HIF, VEGF and angiopoietinmediated signaling pathways.
作者机构：
[Juzuo Zhang; Anwen Yuan; Xuan Peng; Zhilong Chen; Xiujun Fan; Jian V Zhang; Qing Yang; Liqun Xue] Laboratory for Reproductive Health,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences;[Juzuo Zhang; Anwen Yuan; Xuan Peng; Zhilong Chen; Xiujun Fan; Jian V Zhang; Qing Yang; Liqun Xue] Department of Clinic Veterinary Medicine,College of Veterinary Medicine,Hunan Agricultural University
摘要：
Peroxisome proliferator-activated receptor gamma（PPARγ） plays a vital role in placental development of mice and human,but its role and mechanism in pig placentation has not been reported.In the present study,PPARγ expression were investigated in uterus-placenta tissues which were collected from sows on gestation days（GD） 25,40 and 70 using real-time quantitative polymerase chain reaction（qPCR）,Western blot and immunohistochemistry（IHC）.And PPARγ over-expression and deficience were performed in the porcine vascular endothelial cells（VECs） for possible role and mechanism using pIC-neo mammal expression system and CRISPR/Cas9 genome editing system,respectively.Then the angiogenic potential of modified VECs were determined using ICELLegance assay,woud healing assay and capillary-like tube formation assay,followed by determination of the mRNA levels of angiogenic factors,including HIFs-VEGF and angiopoietins signals using qPCR.Results showed that the level of PPARγ mRNA was higher in fetal placenta than that in maternal endometrium on the matched GD40 and 70.In maternal endometrium,expression of PPARγ mRNA was decreased on GD25 and 40 when compared to that of the GD70;in fetal placenta,the level of PPARγ mRNA was also higher on GD40 than that of the GD25,and kept a high level on GD70.The expression of PPARγprotein had a similar trend as its mRNA,kept a higher level on GD40 when compared to those of the GD25 and 70 in both maternal endometrium and fetal placenta.Meanwhile,PPARγ protein was mainly located in the endometrial glandular epithelium and trophoblasts,vascular endothelium and amniotic chorion epithelial cells,with a highest expression in trophoblasts on GD40.In vitro,PPARγ deficience inhibited VECs proliteration and migration,and abrogated the tubes formation.The mRNA levels of HIF1α,HIF2α,VEGF188,Flt1 and Ang-1 were significantly up-regulated in PPARγ over-expression VECs,and Ang-2 with down-regulation.Whereas,the mRNA levels of VEGF isoforms and their receptors were down-regulated in PPARγ null VECs,but HIFs and angiopoietins with insignificantly change.These results suggest that PPARγmediates porcine angiogenesis through VEGF signals,adjustment of VEGF transcription and interaction with their receptors.
通讯机构：
[Xu, DJ; Yang, Q] H;Hunan Agr Univ, Coll Vet Med, Changsha 410128, Hunan, Peoples R China.
摘要：
Colostrum is the main external resource providing piglets with nutrients and maternal immune molecules. Astragalus polysaccharides (APS) have been used as immunopotentiators in vitro and several animal models. This study aimed to determine the effects of APS on immune factors in sow colostrum and milk. The sow diet was supplemented with APS one week before the expected delivery date. Colostrum and milk were collected and designated as 0 h- (onset of parturition), 12 h-, and 24 h-colostrum and 36 h-milk postpartum. Samples were measured using porcine immunoglobulin (Ig) G, IgM, classical swine fever virus antibody (CSFV Ab), epidermal growth factor (EGF), and insulin-like growth factor- (IGF-) 1 ELISA Quantitation Kits. Dietary supplementation of APS significantly enhanced the presence of IgG, IgM, EGF, and IGF-1 in 0 h-colostrum (p < 0.001). The blocking rates of CSFV Ab were increased in samples from APS-supplemented sow when compared to those from the matched samples without APS treatment. The results indicate that supplement of APS could improve the immune components in sow colostrum and/or milk; and status of some specific vaccination could be determined through using colostrum or early milk in sow.
通讯机构：
[Xue, Liqun] H;Hunan Agr Univ, Coll Vet Med, Changsha 410128, Hunan, Peoples R China.
关键词：
DBY;antibody;spermatozoa;gender selection
摘要：
DEAD (Asp-Glu-Ala-Asp) box polypeptide 3, Y-linked (DBY or Ddx3y) is a candidate gene for male-specific antigen. The DBY gene detected in capacitated mouse sperm codes putative ATP-dependent RNA helicase. The objective was to produce anti-predicted DBY multi-epitope fusion protein antibody, which could be used to determine male specificity of DBY. Epitope prediction is to aid the design of molecules that can mimic structure and function of a genuine epitope, is a useful tool in protein molecule design. This study predicted the DBY epitopes, prepared rabbit poloclonal antibody against DBY multi-epitope fusion protein, then investigated its immunoreactivity. The fusion protein used as the antigen consisted of three regions of DBY with greatest divergence from other family members, cloned together in-frame (with a His tag to facilitate purification). The resulting antibody recognized both the DBY1-2-3 fusion protein and an endogenous DBY protein of the same size. Furthermore, DBY protein was present (Western blot) in testis, male mouse splenocytes and brain, whereas a weaker band was present in the female brain and splenocytes, and finally, ovary produced only a barely visible protein band. Optical density of DBY protein was higher for males versus corresponding tissues from females. Finally, positive signals of DBY1-2-3 antibody were present on only similar to 60% of mature murine sperm (based on immunofluorescent staining and flow cytometry), in accordance with the expected proportion of Y-bearing sperm. We hypothesized that our antibodies recognized a specific epitope present in subpopulations of mouse sperm. Therefore, we concluded that anti-DBY1-2-3 antibody could be an alternative way of producing antibodies to DBY protein. Furthermore, this novel DBY antibody against a multi-epitope artificial antigen has potential for both investigating male-specific binding of DBY and as a new method of sex selection.
